Code Quiz

Apr 17, 2008, By Steven Owen

What is the minimum cubic inch area required for a terminal housing supplied with a generator?...

Code Quiz

Apr 3, 2008, By Steven Owen

When installing wiring methods in ducts or plenums used for environmental air, all but which of the following wiring methods are permitted?...

Code Quiz

Mar 20, 2008, By Steven Owen

Which of the following methods for connecting grounding and bonding conductors to equipment is the only one not permitted by the NEC?...

What is the allowable ampacity of any one of the current-carrying 12 AWG THHN insulated conductors installed in a cellular concrete floor raceway with 29 other current-carrying 12 AWG THHN conductors and five equipment grounding conductors?...

Code Quiz

Feb 21, 2008, By Steven Owen

On a 3-phase, 4-wire, 277V multi-wire lighting circuit, which is protected at 20A, there is debate as to the proper application of 210.4(B) and 240.15(B)....

Code Quiz

Feb 7, 2008, By Steven Owen

On a 3-phase, 4-wire, 480/277V service, a question has arisen as to the required rating of the service disconnect. The calculated load is 780A. The fusible disconnecting means is rated at 1,000A, based on the maximum fuse size that can be installed....

Code Quiz

Jan 24, 2008, By Steven Owen

In accordance with the 2008 NEC, excluding exceptions, arc-fault circuit-interrupter protection is required in which of the following dwelling unit locations?...

Code Quiz

Jan 10, 2008, By Steven Owen

Excluding exceptions, which one of the following locations does not require GFCI protection for 15A and 20A, 125V single-phase receptacles?...

Code Quiz

Dec 27, 2007, By Steven Owen

For a 20A, 125V, single-phase receptacle that supplies power to a cord-and-plug connected metering pump, which is integral to a continuous industrial process that cannot tolerate an unexpected loss of power, installed outdoors in an industrial facility, the 20A receptacle...

Code Quiz

Dec 13, 2007, By Steven Owen

In a large electrical room with numerous pieces of equipment rated at 1,200A or more, the question has arisen as to whether panic hardware is or is not required on all of the personnel doors....

Code Quiz

Nov 27, 2007, By Steven Owen

What is the maximum allowable ampacity of a 10 AWG THHN or THWN-2 insulated conductor installed in a schedule 80 PVC raceway (90°C rated) installed underground from the branch-circuit panelboard to the luminaires installed for parking lot lighting?...

Code Quiz

Nov 13, 2007, By Steven Owen

When installing cable- or raceway-type wiring methods, installed in exposed or concealed locations under metal-corrugated sheet roof decking, the cable- or raceway-type wiring method shall be installed and supported so that the nearest outside surface of the cable or raceway is not less than 1½ inches from the nearest surface of the roof decking...

Code Quiz

Oct 26, 2007, By Steven Owen

A new service consisting of 6 individual disconnect switches has been installed outdoors, on the back side of a small retail shopping center...

Code Quiz

Oct 12, 2007, By Steven Owen

A cable tray system has been installed to support service entrance conductors. The service entrance conductors consist of six sets of three-conductor 500kcmil interlocked armored cables installed in parallel in a single layer in the tray. ...

Code Quiz

Sep 27, 2007, By Steven Owen

A 60-foot metal pole supporting luminaires is found to be deficient with respect to the 2005 version of the NEC. The installation consists of the following...

Code Quiz

Sep 13, 2007, By Steven Owen

According to the 2005 NEC (not any specific state or local code), when installing 2-foot by 4-foot fluorescent lay-in luminaires in suspended ceilings, how many corners of any one of the luminaires require an independent support wire to support it?...

Code Quiz

Aug 27, 2007, By Steven Owen

A construction site has 10 office trailers. Each unit is identical. The HVAC unit for each trailer has a motor-rated load current of 27A and a branch circuit selection current of 30A at 208VAC, 3-phase. What is the proper size for the ground-fault, short-circuit protective device for each HVAC unit?...